Edward maddox



.E. MADDOX.

(No Model.)

PLANE.

No. 496,267. Patented A r. 25,1893.

moruumoq WASNiNGTON n c UNITED STATES PATENT OFFICE.

EDWARD lVlADDOX, OF VICTORIA, CANADA.

PLANE.

SPECIFICATION forming part of Letters Patent No. 496,267, dated April25, 1893.

Application filed August 8, 1892. Serial Ila 42,089. (N0 model.)

To all whom it may concern:

Be it known that I, EDWARD MADDOX, of Victoria, Canada, have inventedcertain new and useful Improvements in Planes; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention contemplates certain new and useful improvements inplanes, and has for its object the production of a cheap, simple andhighly efficient plane in which the cutting blade can be readily andeasily adj usted and firmly held at any desired point.

The invention comprisesa plane having its stock or body provided with anopening an adjustable cutting-blade, a screw in engagement with athreaded portion of said blade for effecting the adjustment thereof, aspring closing the rear portion of said opening and bearing on saidblade, and a locking plate or lever having a short arm designed to bearupon and lock said spring, substantially as hereinafter fully set forthand particularly pointed out in the claims.

In the accompanying drawings:Figure 1 is a view in perspective of myimproved plane. Fig. 2 is a vertical longitudinal sectional viewthereof, on the line 0c0c, Fig. 1. Fig. 3 is a view of the bindingspring removed.

Referring to the drawings, A designates the stock or body which ispreferably formed of metal and is hollowed or chambered; anda is theordinary opening, terminating at its lower end in a transverse slot or.

B is a screw-rod or spindle, provided with a threaded portion 11, aninner reduced end I), and a milled head 5*, which is on the outer end ofsaid spindle outside of the rear end of stock or body A, said spindlebeing projected through a hole or opening in said end. The forwardreduced end I) of screw-rod Bis supported by an apertured cross-plate orpartition 19 formed with stock A.

O is the cutting blade, having a forward widened cutting end cl, andprovided with grooves or disconnected threads cl on the under side ofits shank corresponding to the threaded portion of screw-rod B, whichengages therewith. By turning this screw rod the cutting end of theblade can be made to project over or withdrawn from the transverse slota, according to the position to which it is desired to adjust the blade.

D is the binding spring, having an upper short arm d and a lower longarm 01 said arms being connected together by a curved portion (1 whichcloses the upper, rear portion of the opening a. The upper end of thisconnecting portion is designed to fit against a shoulder d of inclinedwall d of stock or body A. The arm d is slightly bent or curveddownward, while the lower arm d has a cen tral bulge or curved portion dE is a locking plate or lever, which comprises a bent or curved arm 6and an inner angular, short arm c. This locking plate or lever ispivotally connected by a cross-pin e projected through stock A, betweenthe sides of which the curved arm 6 snugly fits when the locking plateor lever is closed. A shoulder or off-set e is formed on the upper,inner end of arm e, and the same is designed to engage the outer end ofthe upper arm of spring D and force the same upward, while the outer endof short arm e, when the look? ing plate or lever is closed, bindsfirmly down upon the curved or bulged portion of the lower arm of saidspring. Thus by means of the locking plate or lever the cutting bladecan be firmly bound at any point, its adjustment being effected by theturning of the screwrod when said locking plate is opened, so as torelieve the spring pressure.

The advantages of my invention are apparent to those skilled in the artto which it appertains. It will be seen that I have produced a planewhich is simple; inexpensive; and free from all complications; and onein which the cutting blade can be readily adjusted to any desiredposition and firmly held at any point to which so adjusted.

I claim as my invention 1. The herein-described improved plane,comprising the hollow stock or body having central opening, the cuttingblade having grooves or disconnected threads in its under side, theinclined screw-rod located in and inclosed by said stock or body andhaving its spindle extended beyond said stock or body, the bindingspring also inclosed by said stock or body and the locking plate orlever, pivotally secured to said stock or body and designed to engageand bind said spring, substantially as set forth.

2. The combination of the stock or body having a central opening, theadjustable cutting blade, and the binding spring bearing on said bladeand having a curved portion inclosing the rear portion of said opening,substantially as set forth.

3. The herein-described improved plane, comprising the stock or bodyhaving a central opening, the cutting blade having threads, the rod orspindle having a threaded portion in engagement with said threads of thecutting blade, the spring closing the rear portion of said opening andhaving upper and lower curved arms, the latter bearing on said cuttingblade, and the looking plate or lever fulcrumed between the sides ofsaid stock or body and having its short arm provided with a shoulder oroff-set designed to engage said upper arm of said spring, said arm atits lower end engaging said lower arm of said spring substantially asset forth.

4. The herein-described improved plane, comprising the stock or bodyhaving a central opening, the cutting blade, means for adjusting thesame, the spring having upper and lower curved arms and a curvedconnecting portion designed to close the rear portion of said opening inthe stock or body, and the locking plate or lever fulcrumed between thesides of said stock or body and having short arms designed to engage thearms of said spring and bind the latter, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

EDWARD MADDOX. Witnesses:

OAK P. MYERS, GEORGE MACAULAY.

